performance: 0.871 graphic: 0.801 device: 0.746 network: 0.634 socket: 0.588 semantic: 0.587 boot: 0.525 PID: 0.482 files: 0.479 debug: 0.424 vnc: 0.398 other: 0.355 permissions: 0.331 KVM: 0.176 QEMU freezes on startup (100% CPU utilization) 0.12.5 was the last version of QEMU that runs ok and boots any os image. 0.13.0-0.14.0 just freeze, and the only thing I see is a black screen and both of them make it use 100% of CPU also. Both kernels 2.6.35.11 and 2.6.37.1 with and without PAE support. tested commands: W2000: $ qemu -m 256 -localtime -net nic,model=rtl8139 -net tap -usbdevice host:0e21:0750 /var/opt/vm/w2000.img W2000: $ qemu /var/opt/vm/w2000.img OpenBSD 4.8: $ qemu -cdrom ~/cd48.iso -boot d empty-qcow2.img tried to use `-M pc-0.12` selector, different audio cards (I've found it caused infinite loop on startup once) -- no luck. tried to use recent seabios from git -- still no luck. attached strace log of 0.14.0. everything was tested on HP mini 311C with Intel Atom N270. QEMU 0.15.0 fixes the problem. Closing as "Fix released" according to comment #3